Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: quantos vencedores com # sendo 4
 ###Tabelas: CREATE TABLE tour_de_france_stage_finishes (tour_de_france_stage_finishes_id AUTO_INCREMENT PRIMARY KEY, Year INT, Stage INT, Start of stage VARCHAR, Distance (km) VARCHAR, Category VARCHAR, Stage winner VARCHAR, Yellow jersey VARCHAR) CREATE TABLE performances_by_nations (performances_by_nations_id AUTO_INCREMENT PRIMARY KEY, # INT, Nation VARCHAR, Winners INT, Runners-up INT, 3rd Place INT, 4th Place INT) CREATE TABLE by_configuration (by_configuration_id AUTO_INCREMENT PRIMARY KEY, Rocket VARCHAR, Country VARCHAR, Type VARCHAR, Launches INT, Successes INT, Failures INT, Partial failures INT) CREATE TABLE type_ii__ (type_ii___id AUTO_INCREMENT PRIMARY KEY, Kanji VARCHAR, Name VARCHAR, Builder VARCHAR, Laid down VARCHAR, Launched VARCHAR, Completed VARCHAR) CREATE TABLE skilift_system (skilift_system_id AUTO_INCREMENT PRIMARY KEY, Name or route VARCHAR, type VARCHAR, elevation groundstation INT, elevation mountainstation INT, slope length INT, capacity in persons/hour INT, construction year(s) VARCHAR)  
SELECT COUNT Winners FROM performances_by_nations WHERE # = 4